I found a chick had pipped in my incubator yesterday, but I did not hear any chirping etc. I listened for it, and then decided to investigate. I broke a bit of shell away thinking that the little guy was having a hard time getting out, even though the humidity was high in the bator. Still no sounds, so I took the top off of the egg only to find the chick was dead. Upon further investigation, I noticed that the yolk had not been absorbed seemingly at all. A huge amount was hanging outside of the chicks body. What causes this sort of thing to happen? I have only had it happen a few times, but unlike on this thread, none of the chicks have ever lived.